What to put in the scope
- Assess accessible deposits and identify affected components.
- Explain the removal method and its suitability for the vent system.
- Document remaining material and whether further work is necessary.
Where this service stops
A treatment product is not proof that a flue is clean or fit for use. Aggressive methods may not suit every liner; suitability needs professional assessment.
The evidence to keep
Request comparable before-and-after images, the removal method and limitations. Discuss operating conditions that may contribute without assuming the deposit has only one cause.
Record who performed the work, the date, the identified appliance or flue and any follow-up recommended. When photos are provided, ask for labels that let another contractor understand what they show. A clear record helps distinguish a new condition from an old recommendation at the next visit.
Questions before accepting a proposal
- Is this included in ordinary sweeping?
- How will the liner be protected?
- What must happen before the appliance is used again?
Ask the company to identify travel, roof access, additional flues, permits and disposal separately where they affect the price. Confirm how unforeseen conditions will be explained and authorized. Keep the original estimate alongside any agreed changes.